Pneumatic valve.



i: einen reunir/j oirnicii.

WINFIELD P. PGRTER, GF NEW YORK, E'. Y.

l rrenuraa'ric VALVE.

Specicetion of Lettere Patent.

Patented Nov. 2li, itbil'.

Applica Lion filed March 6, 191e. 'serial Re. M2398.

.ment in Pneumatic Valves, anddo hereby declare that the following is a full, clear,

and exact description thereof.

My invention relates particularly t0 air valves which are adapted to be applied to pneumatic tires. The object of my invention is to provide an air valve for pneu- `matic tires, which is exceedingly eilicient in its operation, which is not provided with parts which may readily get out of order,

` during its inflation.

and which is exceedingly simple in construe tion. Further objects of my invention are to provide an air valve of this character in which the washer used in the valve is supported in such a manner that it may freelyl adjust itlf to a seat and more particularly an angularly shaped seat prior to the final closing of the valve, and in which, further.n more, the valve is constructed in such a manner that while airis being pumped into a 'tire' the opening available for the passage of air is very much enlarged during the introduction of air. 4

While my invention is capable of embodiment in many diliereiit forms, for the purpose of illustration, I have shown only one form thereof in the accompanying drawings, in which,

Figure lis a longitudinal section of my device showing` the valve in open position,-

Fig. 2 is a similar view show-ing the valve in closed position, Fig. 3 is a bottom plan Fig. 4 is av transverse section on the line l-A of Fig. 2.

In the drawings I have shown an outer casing l having on its upper end an outerV screw-threaded portion 2 for connection with automobile pumps and motorcycle pumps and upon its interior a screw-thread 3 for connection with bicycle pumps. Near .the central portion of the casing 1 there is ashoulder 4 which ornis an angular seat for `the rubber washer 5 carried upon a plunger S which constitutes the movable portion of the.valve. This plunger. 6 has a central reduced portion 7 upon which the rubber washer 5 is carried. Said washer 5 prior to the closing of the valve mayl be normally supported away from a conical surface 8, which forms a seat for said vair is being view thereof, and,

and preventing the escape ot any air. -lthe upward movement of the plunger G to 'seat the valve the forward end il will pretacts with the angular seat e.

washer when in closed position. When in open position, however, the washer 5 may be normally supported away from the conical surface 8. Above the reduced portion 7, the plunger t5 has a. cylindrical guiding surface 9, and above this cylindrical portion 9 there 1s alconical surface 10 for purposes to be hereinafter described. Beyond the conical surface l0 theplungr 6 is extended so as to form a central rod llwhich acts also as a uide in the manner to be hereinafter described. At its louer end the plunger 6 has a polygonal body portion 11 and a transverse recess l2 toperniit the air to readily pass by the body portion and into the tire The lower end of the casing 1 has an internal screw thread i3 into `which a fiber block lil, is adapted 'to be screwed, said fiber block lll havin a central polygonal opening l5 to permit t e bloei; to be screwed in and out by means of a tool.

ln the operation of the valve while air is being pumped intothe tire through the valve the extreme .upper end il of the plunger 6 will be opposite the angulaif seat 4 thereby producing a large opening between the plunger 5 and the valve seat while pumped into the tire. At the time, air will readily pass the poiygonal sides of the main body portion il and through the transverse opening 12 into the tire by means of the passageway 15 in the ber washer 14. lil/'hen the air pump is detached the air pressure in the tire will iinmediately force Athc plunger 6 upwardly. Prior to the seating of the washer 5 upon the conical surface 8, said washer 5 ii'ii have had an opportunity to adjust itself to the angular seat ,4 aft-cr which the washer 5 will become firmly seated against the conical surface 8 thereby tightly closing the valve ll vent the valve Jfrom lodging against the valve seat and the conical surface l0 will guide the plunger 6 into its central position prior to the time when the washer 5 con The positiefs ing ot the washer upon the angular seat fi will also be assisted by the cylindi'iial surface 9, inasmuch as said surface will prevent any material. tilting' of the plunger 6 whileehe washer 5 is being adjusted to the angular seat i in the closing operation. At the beginning of the inflation et' the tire the prevent the 'upper end of the forward por.

tion ll from peesing helonv the level of the angular sent l nhile l beve described my invention above in detail Wish it to be understood that many changes may be made therein Without. departing from the spirit of ,my invention.

i claims; v In a, valve9 the combination of a. ca'sing having e, valve seat, a plunger having a seat and :i Washer supported on the plunger away from seid seat thereon when the valve ie open end against said seat thereon when oloee 2. lne valve, the combination of a cesing having a Valve seat, a plunger having a conical seat and a Washer supported on the plunger away from Said seat .thereon when the Valve is open and against said conical seat thereon when closed. i

3ln n valve, the combination of a oasing haviftg an angular valve seat, a plunger having e `conical seat and a Washer supported on the plunger away from said seat thereon when the valve is open and against said conical seat thereon when closed.

In testimony that I claim the foregoing I have hereunto vset my hand.

WINFIELD P. PORTER.

Witnesses ARTHUR WRIGHT L. Bnonnmon. 

